/*===================================================================*/ /* NRDF D1797 Data No.1 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,1; D#=D1797; TITLE=/Isobaric analog state of 14Be/; PURPOSE=/To measure the Isobaric Analog State (IAS) of the neutron-dripline nucleus 14Be for the first time in a charge-exchange reactino 14Be(p,n)14B* in inverse kinematics at E(14Be) = 74 AMeV./; ATH=(S.TAKEUCHI'1', S.SHIMOURA'2', T.MOTOBAYASHI'1', H.AKIYOSHI'3', Y.ANDO'1', N.AOI'4', ZS.FULOP'5', T.GOMI'1', Y.HIGURASHI'1', M.HIRAI'6', N.IWASA'7', H.IWASAKI'2', Y.IWATA'6', H.KOBAYASHI'1', M.KUROKAWA'2', Z.LIU'8', T.MINEMURA'3', S.OZAWA'3', H.SAKURAI'4', M.SERATA'1', T.TERANISHI'2', K.YAMADA'1', Y.YANAGISAWA'3', M.ISHIHARA'3'); INST-ATH=(2JPNYOK'1', 2JPNTOK'2', 2JPNIPC'3', 2JPNTOK'4', 3HUNDEB'5', 2JPNIRS'6', 2JPNTOH'7', 3CPRIMP'8'); /* '1' Department of Physics */ /* '2' Center for Nuclear Study (CNS) */ /* '4' Department of Physics */ /* '7' Department of Physics */ REF=PL/B; VLP=515(2001)255; RCTS=(P(14BE,14B)N, D(14BE,14B)X); PHQS=(ENGY-SPEC, ANGL-DSTRN, X'9', X'10', COULOMB-DISP-ENGY'11'); /* '9' Energy and width of the peak of the decay energy spectra of the 12Be + p + n channel for the (p,n) reaction */ /* '10' Excitation energy of the IAS */ /* '11' Coulomb displacement energy for the pair of 14Be and its IAS. */ /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,1; /* 2003-07-09 : Compiled */ ENR=X%; PHYS-FORM=SLD; BAC=X; POL-TGT=0%; ALGN-TGT=0%; ACC=(CYC'12',PRJFS'13'); /* '12' Primary beam of 100 AMeV 18O on a 1110 mg/cm**2 thic 9Be target */ /* '13' Secondary beam of 14Be selected by the RIKEN Projectile Fragment Separator (RIPS) [T.Kubo et al., Nucl. Instrum. Methods B70(1992)309]. */ INST-ACC=(2JPNIPC'12',2JPNIPC'13'); INC-ENGY-LAB=74MEV/A; ERS-PRJ=8MEV/A; BEAM-INTNSTY=1e4PPS'14'; /* '14' Typical intensity of the 14Be beam with a purity of around 80% */ POL-PRJ=0%; DET-PARTCL=(P,N,12BE); COINC=(P,N,12BE); ANT-COINC=NO; DET-SYS=(PLST-SCT'15',TOF'16'); /* '15' To detect decay particles from 14B*. Resolutions of TOF were about 1.2% (FWHM) for charged particles and about 1.5%(FWHM) for neutrons at the energies of 74 AMeV. */ /* '16' To determine velocities of the decay particles */ ERS-DET=0.15MEV'17'; /* '17' Resolution of decay energy at 0.3 MeV */ /* Experimental Method: - Time-of-flight (To determine velocities of the decay particles) /* Analysis: - Invariant mass method RCT=P(14BE,14B)N; PHQ=ENGY-SPEC; CHM=CH2'18'; /* '18' (CH2)n and C target are used, C target was used to subtract the contributions of carbon nuclei in the (CH2)n target. */ THK-TGT=XMG/CM**2'19'; /* '19' 187 and 152 mg/cm2 for (CH2)n and C target, respectively. /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,1; INC-ENGY-LAB=74MEV/A; SYS-ERR=10%'20'; /* '20' Uncertainties for corrected and uncorrected spectra due to neutron detection efficiency and the reaction losses of the charged particles in hodoscope. */ EMT-1=12BE; RSD=N; /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; EXC-ENGY-EMT'21' DATA1'22' DSIGMA/DE DELTA-DSIGMA/DE'23' DATA2'24' DELTA-DATA2'24' FLAG'25' (MEV) (MEV) (MB/MEV) (MB/MEV) (MB/MEV) (MB/MEV) (NODIM) 16.770 0.000 0.000 +-X 0.000 +-X 1 16.845 0.075 -0.442 +-0.442 -0.023 +-0.023 2 16.895 0.125 0.627 +-0.362 0.058 +-0.034 X 16.945 0.175 0.432 +-0.350 0.056 +-0.045 X 16.995 0.225 1.578 +-0.498 0.267 +-0.084 X 17.045 0.275 2.208 +-0.522 0.459 +-0.109 X 17.095 0.325 1.417 +-0.404 0.342 +-0.097 X 17.170 0.400 0.862 +-0.208 0.238 +-0.057 X 17.270 0.500 0.368 +-0.118 0.116 +-0.037 X 17.370 0.600 0.276 +-0.099 0.096 +-0.034 X 17.495 0.725 0.316 +-0.080 0.116 +-0.029 X 17.645 0.875 0.273 +-0.079 0.102 +-0.030 X 17.820 1.050 0.256 +-0.075 0.094 +-0.027 X 18.020 1.250 0.244 +-0.077 0.084 +-0.027 X 18.220 1.450 0.429 +-0.093 0.134 +-0.029 X 18.445 1.675 0.474 +-0.107 0.127 +-0.029 X 18.695 1.925 0.434 +-0.134 0.101 +-0.030 X 18.970 2.200 0.611 +-0.141 0.114 +-0.026 X 19.270 2.500 0.658 +-0.153 0.097 +-0.022 X 19.595 2.825 0.847 +-0.179 0.097 +-0.021 X \END; /*===================================================================*/ |